How are the ride vehicles propelled on water rides? I'm specifically thinking of flume type rides like Splash Mountain, or dark rides like POTC, IASW, Living With The Land, etc, and not a ride like Jungle Cruise, which is propelled by the motor on each boat. Is it mainly the force of the moving water that pushes each ride vehicle, with the "track" on each side to guide it? You can definitely feel the points on the water rides, especially at load/unload, where there is a conveyor type system underneath the ride vehicle to start/stop. It just seems like a full load of people on a water ride vehicle would make the vehicle too heavy to be moved by anything other than a strong current in the water.